JP4575342B2 - Bidirectional optical signal transmitter / receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and easy-to-manufacture bidirectional optical signal transmitter-receiver. <P>SOLUTION: The bidirectional optical signal transmitter-receiver to be used for connecting an optical fiber is composed by connecting the optical fiber to one end of a T-shaped shell body and providing an optical transmitter on the other end of the shell body forming the same straight line as the optical fiber, and an optical receiver is installed at the third end of the shell body. Among them, the optical transmitter is a transistor type outer shell package structure (TO-CAN) and is a lid of a container shape, and its bottom surface forms the inclination of 45 degrees with the beam route. Also, the hollow transmission window of the bottom surface is provided with a spectroscopic mirror, and the spectroscopic mirror is positioned on the beam route of the optical receiver. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to an optical signal transmission / reception device, and more particularly to a light spitting type bidirectional transmission / reception device.

A known bidirectional optical signal transmitting / receiving apparatus 1 shown in FIGS. 1 and 2 combines an optical transmitter 11 and an optical receiver 12 in a T-shaped shell 10, and connects one end of the shell 10 and an optical fiber 13. The optical transmitter 11 and the optical receiver 12 are respectively installed at the other end of the shell 10, and the optical transmission and reception surfaces of the optical transmitter 11 and the optical receiver 12 have focus lenses 15 and 16, respectively. A light splitting filter 14 is fixed at the intersection of two beam paths between the light transmitter 11, the optical receiver 12, and the optical fiber 13, and the two light beam paths are 45 degrees. One surface where the spectroscope 14 faces the optical receiver 12 and the optical fiber 13 is inclined, and a reflecting coating layer (reflecting coating) is plated, and the beam of the optical fiber 13 is reflected by the reflection film layer of the spectroscopic mirror 14. Reflected downward and received light The beam from the light transmitter 11 passes through the spectroscope and directly enters the optical fiber 13.
A known spectroscopic mirror is built in a shell and generates an optical operation relationship in which an optical signal transmission / reception transmission path distributes processing among three parts of an optical transmitter, an optical receiver, and an optical fiber, and has different assembly forms. In addition, the spectroscope 14 can be directly attached to these patents such as US Pat. Nos. It describes that it is fixed on a fixed base formed or installed inside the shell.

  The bi-directional optical signal transmitting / receiving device described in each of the above patent specifications is an independent member for all of the spectroscopic mirrors, and can be fixed in the shell for the first time after a special fixing and packaging process is required. Is complicated and precise, increases manufacturing costs, and the spectroscopic mirrors require precise and complicated processing steps, making it difficult to reduce the volume of the shell and reducing the volume of the shell. It becomes disadvantageous for the fixing processing of the spectroscope.

U.S. Patent No. 6075635 U.S. Pat.No. 5,841,562 US Patent No. 5838859 U.S. Pat.No. 5,408,559 U.S. Pat.No. 5,347,605 U.S. Pat. Taiwan Utility Model No. 246900 Specification Taiwan Utility Model No. 241892 Specification Taiwan Utility Model No. 224117 Specification Taiwan Utility Model No. 207325 Specification JP 2004-319984 A Japanese Patent Laid-Open No. 2001-74986

  The object / object of the present invention is to solve the above-mentioned conventional problems. In order to avoid the conventional problems, the present invention provides a light having a transistor-type outer shell package (TO-CAN) structure with a simple structure. Adopting a transmitter, the spectroscopic mirror and the optical transmitter package are combined together, the spectroscopic mirror is part of the optical transmitter, and the spectroscopic mirror does not require a separate fixing structure and processing process. The volume is reduced so as not to be restricted by the spectroscopic fixing structure.

In order to solve the above-mentioned problems, the invention of claim 1 is for connecting two-way transmission optical fibers, the shell is T-shaped, and has two straight ends and a third end. The optical fiber is a shell connected to one of the direct ends and an optical transmitter, and is installed at the other direct end of the shell and forms a straight line with a beam path between the optical fiber and the optical fiber. The optical transmitter has a transistor-type outer shell package structure, and has a base and a container-shaped lid that seals the base, and the base is installed at the other direct end of the shell. A lid having a shape has a bottom surface, the bottom surface forms a 45 degree inclination with a beam path between the light transmitter and the optical fiber, the bottom surface is provided with a spectroscopic mirror, and the light transmitter of the spectroscopic mirror A light transmitter provided with a focus lens formed integrally with the side surface facing Only the side facing the optical transmitter of the serial spectral mirror to provide a focusing lens integral with the spectroscopic mirror, an optical receiver, was placed on the third end of the shell, the corresponding light receiving said spectral mirror A light receiving surface of the receiver is provided with a focus lens, of which the beam generated by the light transmitter can pass through the spectroscope, enters the optical fiber, The beam is reflected by a spectroscopic mirror at a right angle with respect to the beam and is incident on the optical receiver.
A second aspect of the present invention, the bottom surface of the lid will be provided a hollow transmission window, the bidirectional optical signal transmitting and receiving device according to claim 1, wherein the spectroscopic mirror are characterized by being fixed on said transmission window It is.
A third aspect of the present invention, on the side facing the optical receiver of the spectroscopic mirror is plated with reflective film layer, the beam from the optical fiber is reflected at a right angle to the beam, toward the optical receiver reflected, the result provided 鍍 gold film layer on the side facing the optical transmitter spectral mirrors, beam from the optical transmitter can be set to the transmittance by the plating film layer, transmitted through direct the spectroscopic mirror and toward the optical fiber being Shako, the beam portion is reflected bidirectional optical signal transmitting and receiving device according to claim 1, wherein said beam is received by the light detecting member, characterized in that the sensor whether the transmitted successfully It is.

  That is, the present invention is a bidirectional optical signal transmitting / receiving apparatus used for connecting optical fibers, wherein an optical fiber is connected to one end of a T-shaped shell, and an optical transmitter is connected to the other end of the shell that is collinear with the optical fiber. The optical receiver is installed at the third end of the shell, wherein the optical transmitter has a transistor-type outer shell package structure (TO-CAN) containing an optical member, and a container. The bottom of the lid forms a 45-degree slope with the beam path, and the hollow transmission window on the bottom is provided with a spectroscopic mirror, which is positioned on the beam path of the optical receiver. To do.

  The bidirectional optical signal transmitter / receiver provided by the present invention employs a transistor-type outer package (TO-CAN) structure optical transmitter with a simple structure and separates the optical transmitter and the spectroscopic mirror as in the prior art. The spectroscope and the light transmitter package are integrated into one body, and the spectroscope is a part of the light transmitter. The spectroscope does not require a separate fixing structure and processing process. Is reduced so as not to be restricted by the spectroscopic fixing structure.

  FIG. 3 is a cross-sectional view of an embodiment of the present invention. As shown in FIG. 3, the bidirectional optical signal transmitting / receiving apparatus 2 according to the embodiment of the present invention includes a T-shaped shell 21, an optical transmitter 22, and an optical receiver 23, and two straight ends 21 a of the shell 21. , 21b, one end 21b is connected to the optical fiber 3 by a pipe 24, and the optical transmitter 22 is fixed on the other direct end 21a of the shell 21. The optical receiver 23 is fixed on the third end 21c of the shell 21, and the beam path of the optical receiver 23 and the beam path between the optical fiber 3 and the optical transmitter 22 are vertical.

The optical transmitter 22 includes a base 220 and a light emitting member 224 on the base 220, and the light emitting member 224 is, for example, a light emitting bipolar body (LED) or a laser bipolar body (LD), and emits light. A light detection member 226 is provided below the member 224, and the container-shaped lid 221 seals the base 220 to cover the light emission member 224 and the light detection 226 on the inside, and has an integrated structure incorporating these light members. A so-called transistor type outer package (Transistor Outline can = TO-CAN) structure is formed.
The bottom surface 225 of the lid 221 forms a 45-degree inclination with the beam path between the optical transmitter 22 and the optical fiber 3, and the central portion thereof is a hollow transmission window 229. The side facing the optical receiver 23 of the spectroscope 222 is coated with a reflecting coating layer 227 so that the beam from the optical fiber 3 is reflected at right angles and reflected toward the optical receiver 23. The side surface of the spectroscope 222 facing the optical transmitter 22 is also provided with a plating film 228, and the transmission ratio of the beam from the optical transmitter 22 can be set by the plating film 228. Then, a part of the beam is reflected and received by the light detection member 226 to detect whether the laser beam is normally transmitted. As is clear from FIG. 3 (FIG. 4), it is preferable to install a focus lens 223 integrally with the spectroscope 222 only on the side surface facing the light emitting member 224 of the spectroscope 222, and the beam generated by the light emitting member 224. Then, the focus lens 223 reflects a part of the beam by the plating film 228 and reaches the light detection member 226 to be sensed.
As described above, the present embodiment is configured by integrally connecting the lid of the light transmitter and the spectroscopic mirror using the transistor type outer shell package structure, and using the transistor type outer shell package structure, This is a bidirectional optical signal transmitting / receiving device that can be assembled in a letter-shaped shell and can be assembled with a spectroscope.

It said optical receiver 23 is preferably a TO-CAN integral structure with a built-in light member, to its light receiving surface, as is apparent from FIG. 3 (FIG. 4), the full Okasurenzu 231 It is preferable to install.

  FIG. 4 is a diagram illustrating a state in which the bidirectional optical signal transmitting / receiving apparatus according to the embodiment of the present invention performs bidirectional transmission of the optical signal. As shown in FIG. 4, after the optical signal transmitting / receiving apparatus according to the embodiment of the present invention is configured by the above-described constituent members, the optical signal transmitted from the optical transmitter 22 is transmitted to the spectroscopic mirror 222 of the lid 221 and the plating film 228 thereof. The optical signal that is transmitted through the optical fiber 3, is incident on the optical fiber 3 arranged in the same axial direction, is propagated to the outside, and propagates from the optical fiber 3 toward the bidirectional optical signal transmitting / receiving device 2 is orthogonally reflected by the reflective film layer 227 of the spectroscope 222 The light is incident on the optical receiver 23 and received.

  The above structure is formed by integrally connecting the lid 221 and the spectroscopic mirror 222 of the light transmitter 22 using the TO-CAN structure. When the structure is replaced with a known independent spectroscope, Not only can the distance between the optical receiver and optical fiber be shortened, effectively reducing the overall volume of the shell, but also reducing the production process and cost, and providing flexibility in the design of bidirectional optical transceivers. Can do.

Therefore, the bidirectional optical signal transmitting / receiving apparatus of this embodiment adopts a transistor type outer package (TO-CAN) structure optical transmitter, and separates the optical transmitter and the spectroscopic mirror as in the prior art. In addition, the spectroscopic mirror and the optical transmitter package are combined together, and the spectroscopic mirror is made a part of the optical transmitter. With such a simple structure, the spectroscopic mirror does not require a separate fixing structure and processing process. The volume of the shell is reduced to a compact size, and is not subject to limitations due to the spectroscopic mirror fixing structure, making it extremely easy to manufacture.
In the present invention, the preferred embodiments have been disclosed as described above, but these are not intended to limit the present invention in any way, and anyone who is familiar with the technology can make an equivalent scope without departing from the spirit and scope of the present invention. Of course, various fluctuations and hydration colors can be added.

It is sectional drawing of the structure of the conventional bidirectional | two-way optical signal transmission / reception apparatus. It is explanatory drawing of the optical signal transmission / reception state of the conventional bidirectional | two-way optical signal transmission / reception apparatus. It is sectional drawing of the structure of the Example of this invention. It is explanatory drawing of the optical signal transmission / reception state of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bidirectional optical signal transmitter / receiver 10 Shell 11 Optical transmitter 12 Optical receiver 13 Optical fiber 14 Spectroscope 15, 16 Focus lens 2 Bidirectional optical signal transmitter / receiver 21a, 21b Direct end 21c Third end 21 Shell 22 Optical transmission Unit 220 base 221 lid 222 spectroscopic mirrors 223 and 231 focus lens 224 light emitting member 225 bottom surface 226 light detecting member 227 reflecting film layer 228 plating film 229 transmission window 23 light receiver 24 pipe 3 optical fiber

Claims (3)

It connects two-way transmission optical fibers,
The shell is T-shaped, has two straight ends and a third end, and the optical fiber is connected to one of the direct ends ;
An optical transmitter, which is installed at the other direct end of the shell, and forms a straight line with a beam path between the optical fiber, and the optical transmitter has a transistor-type outer shell package structure. A container-shaped lid for sealing the base; the base is installed at the other direct end of the shell; the container-shaped lid has a bottom surface; and the bottom surface includes the optical transmitter and the optical fiber. An optical transmitter having a 45 ° inclination with respect to the beam path, a spectroscopic mirror provided on the bottom surface, and a focus lens formed integrally with the side surface facing the optical transmitter of the spectroscopic mirror When,
Only provided the focus lens integrally with the spectroscopic mirror side facing the light transmitter of said spectral mirror,
An optical receiver, installed on the third end of the shell, including the optical receiver corresponding to the spectroscope, provided with a focus lens on the optical receiving surface of the receiver,
Among them, the beam generated by the optical transmitter can pass through the spectroscopic mirror, is incident on the optical fiber, and the beam from the optical fiber is reflected at right angles to the beam by reflection of the spectroscopic mirror. A bidirectional optical signal transmitting / receiving apparatus characterized by being incident on an optical receiver. The bottom surface of the lid will be provided a hollow transmission window, the bidirectional optical signal transmitting and receiving device according to claim 1, wherein the spectroscopic mirror are characterized by being fixed on the transmission window. The side facing the optical receiver of the spectral mirror and plated the reflective layer, the beam from the optical fiber is reflected at right angles to the beam is reflected towards the optical receiver,
Be provided 鍍 gold film layer on the side facing the optical transmitter of the spectral mirror, beam from the optical transmitter can be set to the transmittance by the plating film layer, transmitted through direct the spectral mirror the optical fiber The bidirectional optical signal transmitting / receiving apparatus according to claim 1, wherein a part of the beam is reflected and received by a light detection member to detect whether the beam is normally transmitted.

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